8-4 Project Part Two Presentation

Please do Question 2

Climate Change: Which of these is an example of a human activity that causes climate change? O Burning fossil fuels O Removing greenhouse gases O Using alternative energy sources O Increasing ash particles from volcanoes

Chapter #3, Question #13: Consider the following data for total atmospheric column ozone measurements (as DU) at three locations around the Earth, obtained using the TOMS in 2001.   January 15 april 15 july 15 october 15 Tierra del fuego (Chilie, argentina) 323 261 339 206 Nairobi (Kenya) 234 273 266 (Aug. 15) 266 Kiev (Ukraine) 321 420 314 273   Assume that these are typical of values that might be obtained in any other year, and discuss the trends as you move down the columns and along the rows, in terms of your knowledge of stratospheric ozone behavior.

Create a model that explains a nuclear reaction within the context of its application :  Nuclear fission reactors  An equation for the nuclear reaction in your model  A visual representation of the nuclear reaction occurring  A written explanation of the reaction and how energy and matter are transformed and conserved throughout the reaction  The context and/or application of the nuclear reaction  Where does the reaction occur?  What impact or relevance does this reaction have to society?

Part A Which route would be better: one that produces a small amount of hazardous waste or one that produces a large amount of nonhazardous waste? Which green chemistry metric accounts for this dilemma? Match the items in the left column to the appropriate blanks in the sentences on the right. Reset Help minimize The best route is because it should the E-factor and maximize the effective mass yield. the one that produces a small The accounts for this dilemma as it looks at the amount of relative to amount of hazardous waste the amount of E-factor product made the one that produces a large amount nonhazardous waste materials used difficult to choose hazardous reagents used waste produced Submit Previous Answers Request Answer

Which of the following questions would not be of scientific importance? Note: there is more than one correct answer here. a. Does fracking affect the frequency of severe earthquakes? b. What was the best album of 2022? C. What were the radiation levels of the Three Mile Island meltdown? d. Who is the fastest-The Flash, Quicksilver or Sonic the Hedgehog? e. Is there a possible vaccine for RSV?

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Dr. X claims that she has found a new remedy (carrot extract) to cure acne. She scores an interview with the science writer for a local newspaper, and gets a brief article written about her and her claims in that newspaper. The article does not contain any experimental evidence, but mentions that Dr. X accidentally splashed some carrot extract on her face and found that the acne was reduced a few days later. Student Y finds the article and cites it as a source for a paper he is writing for class, as evidence that acne has been cured. (a) Is this finding a fact, a theory, a hypothesis, or an observation? Explain why you think so. (b) Was it OK for Student Y to use the newspaper article as evidence for his paper? Explain why or why not.

Consider these questions about living with nuclear power, and then answer them. Would you live near a nuclear power plant? Explain your response. What kinds of jobs are available at a nuclear power plant? Identify the benefits and risks to someone who is working at a nuclear power plant. How does the presence of a nuclear power plant impact the economy of local communities and the lives of people living nearby? What do you think are some reactions of individuals within the communities that are close to nuclear power plants? Explain why you think they might have these reactions.

from 4 to 6 please   thank you

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student found a bottle of unknown origin in the basement of an "CAUTION—contains С₁H₁O.” No other A old house. The bottle was labelled information was given, but inside the bottle were some white crystals. The student took the bottle to a chemistry laboratory, where she analyzed the crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4 adding one mole of Br, and forming C₁₂H₁OB2₂. When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two different samples, J and K, were obtained. Compound J had a molecular formula of C.HgO₂, and its NMR is shown below. Compound K had a molecular formula of C₂H₂O, and it could be oxidized to compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet (1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm. students, deduce possible…

1.Explain the slogan about chemical safety " A spill, A slip, A hospital trip" 2.How do you apply 5s(sort, set in order, shine, standardize, sustain) to attain chemical safety at home and in school?. Enumerate

Define each of the followings: (1) environmental science, (2) Environmental Chemistry, (3)Lithosphere, (4) Biosphere, (4) environmental biochemistry, (5) toxicological chemistry, (6) Ecology .